<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div id="app">
      <button>改变文本</button>
    </div>
    <!-- 注意: 部署时，将 "development.js" 替换为 "production.min.js"。-->
    <!-- jsx特点：多个标签最外层（根）只能有一个标签 -->
    <script
      src="https://unpkg.com/react@16/umd/react.development.js"
      crossorigin
    ></script>
    <script
      src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"
      crossorigin
    ></script>
    <script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>

    <script type="text/babel">
      // 封装APP组件
      class App extends React.Component {
        constructor() {
          super();
          // this.message='Hello World'
          this.btnClick = this.btnClick.bind(this);
          this.state = {
            message: "Hello World",
            movies: [
              "大话西游",
              "盗命空间",
              "星际穿越",
              "流浪地球",
              "倒挂金钩",
            ],
          };
        }
        render() {
          return (
            <div>
              {/*方案1bind绑定this显示绑定*/}
              <button onClick={this.btnClick}>改变文本</button>
              <ul>
                {this.state.movies.map((item, index) => {
                  return (
                    <li
                      className={item}
                      onClick={(e) => {this.liClick(item, index, e);}}
                      title={index}
                    >
                      {item}
                    </li>
                  );
                })}
              </ul>
            </div>
          );
        }
        btnClick(event) {
          console.log("按钮发生了点击", event);
        }
        liClick(item, index, event) {
          console.log("发生了点击", item, index, event);
        }
      }
      // 渲染组件
      ReactDOM.render(<App />, document.getElementById("app"));
    </script>
  </body>
</html>
